pitman



Feb. 20; 1923.

. H. L. 'PITMAN.

COMPUTING MACHINE.

2 SHEETSSHEET l- HLED OCT- 23. 1920,.

' Feb. 20, 1923.

H. L. PITMAN Q COMPUTING MACHINE- 2 SHEET-SHEET 2.

FILED OCT. 23, I920.

to which said pin-bars Figure 3 is a view showing certain of the parts in the positions assumed when the error key is depressed.

Figure 4 is a view of certain of the parts shown in Figure l, but showing; these parts in error-lrey-loclring position due to movement oi? the general operator.

Upon actuation. of a numeral. key 10, a pendant or linlr ll pivoted thereto will act on a lever to rock a shaft 13 on which said lever is fixed. Rocking off the shaft 13 effects by means of an arm 14 secured there on a pin-setting movement of: a linkage having a lower bar 15 adapted to set pin 16 on a Selected pinbar or denominational member 17. The pins n said bars are normolly to the rear of the paths oi the bars 15, and are brought into position to be actuatcd by said bars by suitable denomination-selecting means which will cause the denominational members 17 to be advanced seriatizn to positions to permit pin-setting. This denoi inationselecting means may be substantially the same as that disclosed in the patent to Hart, No. 1,287,301. of December 1O, 19%, and comprises rods or thrust links 18, which, when actuated. will swing corresponding levers 19 about their pivots,

i and by means of transposition linkages 20 and bell-cranks 2i engaging pins 22 on the respective denominational members 17, advance the latter to pin-setting positions.

filter a number has been indexed on the pins 16 of the proper pin-liars or i national members 1? a niotor-sa w .3 2.3 may be depressed against the action cl :1 spring; 24: thereby swinging a lever about its pivot 26 to depress the right-hand end oi" a lever 27. thereby lifting}: a motor-trip pin 28 and releasing the mot which. by means of a member 29 projecting into a yoke 30 on the general operator 31, will cause the latter to be reciprocated. Upon forward movement of the general operator, bar 32. constituting a part thereof, will enthe depressed pins 16 and actuate the denominational members 17 to actuate, in accordance with the pins set, dial wheels 17 are suitably gearerrl, the result of the computation being; read, through a sight-opening 34. Upon rcturiti ot the general or orator, the pin-bars 1'? will be restored to their normal positions and the depressed pins will be reset in the usual manner; The connections for starting the motor may be in. general the same as those dfscloscl in the (o-pending application of: Carl E. hlorin, llo. 309.836, tiled July 10, 1919, now Patent llo. 'i.. Zli'0,i75r dated lrlarch 1. W521. and the motor cordirolled the pin 28 as Well as the connection. between the inotor and the general opera-tor may be substantially the same as in the patent to Alfred J. -Flood,

No. 1,299,646, dated April 8 1919.

lt should be understood that more than one register coniprisii'ig' dial wheels 33 may be provided; a set of pin-bar and denomination-selecting; mechanism being associated with each register but the pin-setting linkage being common to all of the sets ct. pinbars.

Provision nia be made oi? subtractionsetting niechanisin having; 1 lany features in con'unon with that disclosed in said lilinton patent. As herein disclosed. the depression oi a subtraction key 35 will move a linl: 36 against the resistance of a spring 37, and, by means of an arm fixed on shaft 39, rock the latter to withdraw a hook 4L0 troni engagement with a shoulder on a sulitraction-bar ll, porn ittino; the latter to be drawn to the rear bv sorino' Such movement of the subtraction-bar 4:1 will efi ect, through a bell-crank a3 and an arm at connected to a bar pivoted near its upper edge, rocking of bar 41 5 and thereby shift the shaiitsl to change the connection between the arms i l and the pin-setting linkages. JlS a result oi? such change the shafts when rocked, will actuate the pinsetting; linkages which are complementary, to the nine, of the linkages actuated thereby when the shafts in th inal positions. The rearward movement of subtraction-bar all will also ei'l ectq through connections not shown depression of all of the 9 pins by means of a bar 4L6. As is well known to those skilled in the the parts are now positioned to enable indexino' number for subtraction by the complcinental method.

Provision may also be lever l? corrcspondir to one sl own in the l liuton. patent, in nhch it forms part of the mechanism by which automatic tripping ot the motor is enected. The forward end oi this lever overlies a pin on a verticallyniovable slide 4:9 en 3 lever 27 so that made of a pivoted near its riqht-hand end noon y r 1 l W QlQVRtlOJ. oi the rearward arm or lerer 13-4. the controlling pin will be lifted and motor. l llo ion oi" the rcvi'ward arm of love 1-? will also effect. through a arm mounted on a 51, actuation of the shalt and an arm thereon to shift. a slidab-lo latch nieniliier against the action oi? a spring: (not shown) thereby releasing an arn'i mounted on L. she 55, so that the ter 1 y be rocked by means spring 56, a pla 5'? connected therewith, and an arm 58 having I sectors 11a) and piiiioiis operator ol.

cope Vn 'i tioii improvements may be 'lzwi'ozr thus described my invention 1 chain:

1. 111 eoiiibinetiom eoi comprising 1 1 be 1 exec one e ;e-

n umbers numbers so i; 1 motor motor-(zeta said general operator, :o'i member by which said may be operated actuated r numbers ii L motor-acme eneral 3) member j. 1 me oe hey-sctu the index dew noel condit on inc seid member numbers ind we ('OPljflltiXh motor-actuate Q'GHL-Jtl operator. 7 be? by which said in otor-- operated" error oted m ens Where be rPSz'IflQlTl to normal co,

:1 ii'lembor which moon error key will b 10 with the motoe meti'iber ngg oinsin10 1 In combr otioin con iitm 2:1 ecb on sm coir arising; Wh ch llilfnl' ei's i 7 be ,dexed eel operator where numbers so lHClG' be corngated motor, a motor-trip device, a key to operate sold motor-trip device directly, a second key, a lever actueble by said second key and peeltioned to ene'eo'e the motor-trio device on device, device tor operating said motor on error heyg error 1r bl chingbo ces to prevent :1 omen ioneil de' thereby oil: the mo l. v combineti in i echonisin oer: s devices in whi i i he's in y be ino d eccordsnce ix 1 omerzil c pointer Wl'iercby i i omputeo, actuating); means for said geno1 on error icy, error-heyectumeans whereby the inc er: devices iii iy estored to normal condition me as eoy actuation of said error my will i cectiietioii of the general operatoiu and means whereby said numeral lre i 's will be upon actuation of error key. 1 combination, computing; mechanism devices in which numbers ll 1y be e l and :1 gei eal opei or woereby crs so indexed may be computed actuieens for said general operator, 61101 hey, erroricy-actuated means Where bythe incei; dey'ces i iiy be restored to norionl means whereby actuation of Klill colic said error lrey W1 or vent actuation of said L oerel opera or end locking means for sold error key controlled by said general opererror ley will. prevent act-notion of said eel operator, and. on error-key lock 1101- held in incli ectivo condition by said eral operator but permitted to become ecti've upon movement of the general operator from its normal position.

:9. In combination. eoiiigutm j mechanism comprising iiuizieral keys devices in which numbers may be lIi(lX6(l in ecco dance with the numeral keys depressed and e general operator whereby numbers so indexed may said error key, will be moved into engagement with the motor-tripoperating member and lock the same against movement, and an error-key loci; normally held in inettective condition by said general operator, but permitted to become eti'ective upon movement of he general operator from its normal position.

19. In combination, computing mechanism comprising numeral keys, devices in which numbers may be indexed in accordance with the numeral keys depressed, and a general operator whereby numbers so indexed may be computed, a motor, a motor-trip d vice, a member to operate said motor-trip device directly, amotor-trip key, a lerer actuable by said motor-trip key and positioned to engage the motor-trip device, an error key, error-key-actuated means whereby the index; devices may be restored to normal condition, error-key-actuated means for locking;- said member and the lever con rolled by said motor-trip key against movement, and locking means tor said niuneral keys rendered eiiei-tive upon actuation of said. error key.

20. In combination, computing mechanism eomprir-singr devices in which numbers may be indexed and general operator whereby numbers so ind 4d may be computed, a motor, motor-trip device, a key to operate said motor-trip device directly, second key, a lever actuable by said second key and positioned to enga the motor-trip device, an error key, e ror-key-actue til meanswhereby the inner; devices may be restored to normal condition, erro'r-key-actuated means for locking said first key and the lever controlled by said second key against mov ment, and locking means for said error key controlled by said general operator.

21. In combination, computing mechanism comprising" devices in which numbers may be indexed and a general operator whereby numbers so indexed may be computed, a motor, a n'iotor-trip device, akey to operate said motor-trip device directly, a second ke a lever actuable by said second key and positioned to engage t e motor-trip device, an error key, error-kt actuated means where by the index devices may be restored to normal condition. error-keynoteated means for locking said first key and the lever controlled by said second key ag'z'nst movement, and error-key lock normally held in ineffective condition by said general operator, but g iermitted to become etlcct-i ve up'oa movement the general one. or from its normal position.

22. l n combination. computing mechanism comprising: numeral keys, devices in which numbers may be indexed in accordance with the numeral keys depr ed, and operator whereby numbers so indexed may sa i trip (evlce, a separate device for operating said motor-trip device, an error key, error-key-controlled means for blocking both of t 1e last mentioned devices to prevent operation thereby of the motortrip device, and locking means for said numeral keys rendered eitective upon actuation of said error key.

in combination, computing mechanism con'iprising devices in which numbers may be c icd and a general operator whereby numbe so indexed may be computed, i'notor, a motor 'ip device, 1nanually operable device for operating motor-trip device, a separate levice. tor operating said moterdrip device, an error key, error-key-contrclied means for blocking both of the entioned devices, to prevent operation thereby oi the motortrip device, and locking means for sa error key controlled by the general operator.

l 2 ion, computing mechanism as. in combin comprising devices in which numbers indexed and a general opera-tor whereby numbers "red may be computed, a motor, a motor vlip device, a manually operable device for operating s (i motortrip device, an error key, error-key-controlled means -for blocking; both oi the last-mentioned devices, to p event operation thereby ot the motor-trip device, and an error lock normally held in ineffective condition by said general operator, but permitted to become effective upon movement of the general operator from its normal position.

25. ln combinati 1, computing mechanism comg'irising devices in which numbers may be indexed and a e'eneral operator whereby numbers so indexed may be computed, a manually op able member, men .s whereby actuation 0; said member will cause actuation oi? the general operator, an error key, errorey-actuated means whereby the inde devices may be restored to normal condition, ans whereby actuation of said error l ey will prevent operation of said member.

In combination, computing mechanism com rising numeral devices in which numbers 1 be i operator it be computed, a

able member, means whereby aid member will caue actu tion of the gene al operator, an error 1' error-keyactua vd mes Ylltll'al the lClQK devices may be restored to normal means a n of said erro., hey will whereby sale. member. and lockl numeral keys rendered effective upon actuation of said e 'ror key.

in combination, computing mechanism in "\VllllG computation is effected by 3 i n coinbin" on, computing mechanism coin devices in which numbers may 'ie indexed and operaring ileens whereby numbers so indeed may be computed, an error hey, error-ney-actuated rneans whereby the mud; devices may be restored to normal con "ion, and to prevent operation of the error key while said operating means is shooting computation, and to pre- 'ent the ope? 'on of said operating means While the error hey is depressed.

2:57, in a combined rypewri'ting and coini i n combinn 'on, typewriting ineoh in including; numeral Keys to type digits when d grossed, coi puting mechanism c ising denoniinitional de *ices in may inz :ed, one by one, sly with the typing thereof, and neral operator whereby numbers of ilch the digits have been indexed and O ped may be corn'pur an error hey, errorhey-aciuated nie s whereby the index de vices may be restored to normal condition, and mea s whereby sf. error key will be iocl zied ri'hile computation is being eliected by said operating means.

In combined typeu'ril-ing; and computing machine, in combination, typewritmechanism including numeral keys to w pe dignis when depressed, computing mechanism comprising denominational devices in Whici'i digits may be indexed, one by one, concomitantly with the typing thereof. and a general operator whereby numbers of which the digits have bee so indexed and typed may be computed, an error key, errorlaey-sctuated means whereby the index devices may i restored to normal condition, and means whereby lo of said nurse: fl eii'eceed upon actuation of said keys will error key.

39, in a combined typewriting'and computing machine, in combination, typewritmechanism inciuding' numeral keys to orgies when depressed, computing ID-(i-Cl?l1iSli1 comprising denominational devices which digits may be indexed, one by one, concomitantly with the typing thereof, and a general operator whereby numbers of which the have been so indexed and typed may be computed, an error key, errorkey-actuated means whereby the index-devices may be restored to normal condition, a numeral-hey loch, an error-key lock, a member for controlling said operating means, and means whereby actuation of said memwill render said numeral-key lock and said error-key lock effective.

liEllRY L. PETE IAN.

Vi itnesses EDITH LIBBEY, CATHERINE A. NEWELL. 

